Sectional insulator



Nov. 22, 1927. 1,649,853

J. M. PECK SECTIONAL INSULATOR Filed Jan. 8, 1923 INVENIOR.

15 A TTORNEY Patented Nov. 22, 1927.

' "STATES PAT NT OFFICE.

JOHN M. men, or LIMA, N'EWYoR-K, assrenon 'r'o trnnyroncnnam iusnnA'ron CORPORATION, or LIMA, NEW YORK, A con-ronnrion or NEW YORK.

SEGTIONAL INSULATOR.

Application filed January 8, 1923. Serial No. 611,315.

My invention relates to a sectional insulator of the general type embodying two or more sections of porcelain or similar insulating material nested and secured together, and it has for its purpose to afford an arrangement that can be readily manufactured at a low cost.

A further object of my invention is to pro vide a structure that is durable and will successfully withstand any unusual strain or temperature changes to which it may be subjectcd under usual operating conditions.

Another purpose of the improvement is to cement the nested sect-ions together in such a manner that the cement will be evenly distributed between the attaching surfaces, and so as to eliminate the necessity of removing surplus cement from the exterior of the insulator after its completion.

Other objects and advantages will appear from the following description of the invention, when read in conjunction with the accompanying drawing, the novel features being pointed out in the claim following the specification.

The drawing is a sectional view of an insulator constructed in accordance with a preferred embodiment of the invention.

In the construction illustrated, which constitutes one example of a practical application of the invention, 1 designates the upper section, while 2 is the lower section, having a rounded head or end 3 fitting into a correspondingly rounded recess or pocket 4 on the upper section, said parts 3 and i coustil'uting positioning surfaces which make it possible to readily bring the two sections into proper relationship centrally of each other. The positioning surfaces 3 and 4; are separated by a thin film of suitable resilient cement interposed therebetween for filling the irregularities in said surfaces, as usual in this type of construction.

In order to secure the sections together, the lower section is made relativelythick at its upper part as designated at 5, and its positioning surface 3 terminates at said thickened portion in an annular groove or recess 6, extending entirely around the body of the insulator. The upper section 1 is provided with an attaching portion or base 7, also annular 111 form, and located in the aforesaid groove or recess 6. The recess 6 is filled with a non-resilient cement surrounding the attaching portion 7, and serving to hold the sections together in a most rigid :manner, whileS is a film of resilient cement interposed against the bottom of base 7.

In the preferred method of assembling the sections, a proper amount of cement of a non-resilient nature is inserted in the groove or recess 6, while a proper amount of resilient cement .is placed on the rounded. head or end of the lower section and also over the bottom of the attaching portion 7 of the upper section. The upper section is then brought down onto the lower sectionportion or base 7, entirely filling the space between said attaching portion andthe at taching or side walls of the recess. This method of assembly eliminates the necessity of injecting cement through an opening after the sections are nested, and also obviates cleaning cement from the exterior sur' face of the insulator after the sections are joined together, because the amount of cement placed within the groove 6 can be eas ily regulated so that it will just about fill the space surrounding the attaching portion 7 when the upper section of the insulator has been forced down upon the lower section. The completed structure affords an extremely strong and durable insulator, while the cost of manufacture is reduced to a minimum, owing to the relative short time re- The invention is not confined to the details herein disclosed, but may be modified in various ways without departing from the underlying features of the improvements, and this application is intended to cover any such changes or departures as may come within the essential principles of the invention or the scope of the following claim.

I claim: 7

An insulator comprising a plurality of nested sections, a projection on one section fitting into and being guided and centered by a corresponding recess 1n another sectlon, an annular rim surrounding the recess of said other section, said rim fitting into a corresponding annular groove in said first section, a resilient cement interposed between said projection and said recess, alayer of resilient cement on said annular rim, and a non-resilient cement 0n the sides and hot-- tom of said annular groove, said resilient l0 uniting said sections throughout their central areas.

In Witness whereof, I have hereunto 15 signed my name.

JOHN M. PECK. 

